@property
    def input_keys(self) -> List[str]:
        """Return the singular input key.
        :meta private:
        """
        return [self.input_key]
    @property
    def output_keys(self) -> List[str]:
        """Return the singular output key.
        :meta private:
        """
        return [self.output_key]
    def _call(self, inputs: Dict[str, str]) -> Dict[str, str]:
        question = inputs[self.input_key]
        create_draft_answer_chain = LLMChain(
            llm=self.llm, prompt=self.create_draft_answer_prompt, output_key="statement"
        )
        list_assertions_chain = LLMChain(
            llm=self.llm, prompt=self.list_assertions_prompt, output_key="assertions"
        )
        check_assertions_chain = LLMChain(
            llm=self.llm,
            prompt=self.check_assertions_prompt,
            output_key="checked_assertions",
        )
        revised_answer_chain = LLMChain(
            llm=self.llm,
            prompt=self.revised_answer_prompt,
            output_key="revised_statement",
        )
        chains = [
            create_draft_answer_chain,
            list_assertions_chain,
            check_assertions_chain,
            revised_answer_chain,
        ]
        question_to_checked_assertions_chain = SequentialChain(
            chains=chains,
            input_variables=["question"],
            output_variables=["revised_statement"],
            verbose=True,
        )
        output = question_to_checked_assertions_chain({"question": question})
        return {self.output_key: output["revised_statement"]}
    @property
    def _chain_type(self) -> str:
        return "llm_checker_chain"
By Harrison Chase